Two-piece interlocking trim



I Oct. 16, 1934. o, MacNAB ET AL I 1,971,073

TWO-PIECE INTERLOCKING TRIM Filed July 21, 1932 2 Sheets-Sheet l WR. Ulzamberliw 0; Mac Nab J3 J3 Broiao I. W Barry C. E Zoelzr Oct.l6, 1934. o. Ma NA-B ET AL TWO-PIECE INTBRLOCKING TRIM I Filed July 21, 1932 2 Sheets-Sheet 2 V Jwmw WE. C/lamberlifl/ 0. MacJVab J1 J1 flraz'do 1. "(Barry C! E Loelzr w% W locking connection Patented Oct. 16, 1934 OFFICE TWO-PIECE INTERLOCKING TRIMI Oscar MacNab, Chicago, 111., Samuel S. Broido, Lynbrook, N.*Y., Charles E. Loehr, Wooster, Ohio, Fred W. Barry, Pittsburgh, Pa., and Willie R. Chamberlin,

Waukegan, Ill

., assignors to Wooster Products Inc., Wooster, Ohio, a corporation of Ohio Application July 21, 1932, Serial No. 623,832

3. Claims.

The invention relates to trim members for wall coverings and the like, and more particularly to a two-piece interlocking metal trim for anchoring wall or floor coverings in position.

The improved trim construction comprising the present invention is suitable for substantially all kinds of floor and wall coverings, including flexible and non-flexible coverings; because the present construction includes a securing member which is fastened to the wall or floor, and a facing member which is interlocked with the securing member after the covering is in place, the facing member acting to cover and firmly secure the edges of the covering in position.

In a prior wall trim construction of the interlocking type. the securing means comprises sheet metal clips located at intervals along a sheet metal facing strip and interlocked therewith, the clips being fastened to the wall on the longitudinal center line of the strip and in the plane of the interlocking joint. Since both the securing and facing members are of sheet metal, they are easily bent or distorted before installation, with the result that they do not interlock properly. After installation the facing strip is easily dented and presents an unsightly appearance.

In this prior construction, .not only does the facing strip tend to bend or warp out of shape because it is only interlocked at intervals with the securing clips, but the clips are easily loosened from the wall due to the fact that they are secured thereto only in the plane of the interbetween the clips and the facing member..

' Furthermore, the adaptation of this prior construction to the corners of a wall, and particularly to an outside corner, is entirely impracticable, because the nails or screws which secure the clips to the wall must be driven into the wall exactly on the intersection of adjoining walls?- and in the case of an outside corner, the wall corner must berecessed to receive the securing clips.

Accordingly, it is an object of the present invention to provide a two-piece trim construction including a metal member of solid cross section and a sheet metal member having a resilient interlocking connection therewith.

Another object is to provide a two-piece interlocking trim having a securing member co-extensive with the facing member.

Another object is to provide a two-piece interlocking trim in which the means for fastening the securing member to the wall is spaced laterally of the interlocking joint.

A further object is to provide a two-piece interlocking trim which may be easily adapted and secured to inside and outside wall corners, without altering the wall in any way.

Other objects include the provision of a durable, inexpensive, and easily assembled trim which may be easily installed, and which firmly anchors the wall covering in position while at the same time presenting a pleasing and ornamental appearance.

These and other objects are accomplished by the improvements comprising the present invention, which may be stated in general terms as including a securing member and a facing member having a resilient interlocking connection therewith, the securing member being co-extensive with the facing member and having laterally extending flanges in the plane of the outer surface of the walls, and the facing member having laterally projecting portions engaging over the outer adjacent edges of the wall covermg. In the drawings forming part hereof, we have shown our improved strip construction as applied to flexible wall covering, but it is obvious that it may be used with other types of wall coverings such as tile and the like, without changing the illustrated constructions and without departing from the scope of the invention.

Referring to the drawings,

Figure 1 is a fragmentary perspective view of a portion of a room showing wall coverings positioned on the walls by means of the improved trim construction;

Fig. 2 is a fragmentary sectional view taken on line 2-2, Fig. 1;

Fig. 3 is a fragmentary sectional view taken on line 33, Fig. 1;

Fig. 4 is a fragmentary sectional view taken on line 4-4,' Fig. 1;

Fig. 5 is afragmentary perspective view 01' the trim members shown in Fig. 4, in detached position;

tached, as for instance Fig. 6 is a sectional view of a modified form of the construction shown in Figs. 4 and 5;

Fig. 7 is another modification thereof;

Fig. 8 is a sectional view of a two-piece interlocking trim similar to the form shown in Fig. 5, as adapted to floor coverings;

Fig. 9 is a modification of the form shown in Fig. 8; and

Fig. 10 is a sectional view of a form similar to that shown in Fig. 5, as adapted to a stair tread nosing.

Similar numerals refer to similar parts throughout the several views of the drawings.

In Fig. 1 the walls of a room are shown at 11, and the wall covering is indicated at 12. The panels of wall covering may be held in place at their lower edges by means of the usual baseboard 13, or a molding, and at their top edges by means of the molding 14.

Several forms of our improved trim construction are shown applied to the wall in Fig. 1, an outside corner trim being shown at 15, an inside corner trim at 16 and a straight wall trim at 1'7.

A straight wall trim 17, which is shown applied to the wall and wall covering in Figs. 1 and '4 is shown in detached perspective in Fig.. 5. The facing member 18 is of solid metal, which may be extruded, cast or drawn, and preferably has an exterior ornamental contour such as is shown in the drawings. The securing member 19 is providedat its longitudinal center line with an outwardly opening resilient is preferably dovetail in cross section, and has plane sides constituting resilient projections formed by reverse bends, the inner side portions of the channel being inclined toward each other as shown in the drawings.

Securing flanges 21 extend laterally from opposite sides of the channel 20 and are adapted to lie in the plane of the outer surface of the wall to which the securing member 17 is atthe surface 22 of wall 11 as shown in Fig. 4. Holes 28 are provided at intervals in the securing flanges 21, and the securing member is secured to the wall by means of screws 24 inserted through the holes 23.

The facing member 18 is preferably provided at its central portion with a longitudinally extending substantially rigid rib 25 of dovetail shape, having inclined plane sides and adapted to force-enter and wedge-fit into the resilient channel 20 in securing member 19 to form a resilient interlocked joint between facing member 18 and securing member 19, when the rib 25 is forced into the channel 20 in a direction perpendicular to the wall 11 to which the securing member is attached.

The term force-enter" means that the rib 25 may be entered in the resilient channel 20 by forcing the rib .into the channel in a direction perpendicular to the wall 11. The entry of the rib of alength of facing member 18 into the channel of a length of securing member 19 is somewhat facilitated by iirst forcing one end of said rib into one end of said channel, and then progressively forcing the remainder of the rib into the channel. I

Where the bottom corners of the V dovetail rib 25 are sharp, as shown in Fig. 5, entry of the rib into the channel 20 is further facilitated by entering first one corner and then distorting the sides of the channel sufiiciently to enter the other corner. r

The facing member 18 may be and preferably is provided with laterally projecting portions 26 channel 20 whichwhich, in assembled position, are spaced from the flanges 21 a distance substantially equal to the thickness of the wall covering, and the projections 26 are adapted -,to engage over the outer adjacent edges of adjacent panels of the wall covering, as .best shown in Fig. 4.

The securing member 19 is made co-extensive with the facing member 18 and the channel 20 and rib 25 are each co-extensive with their respective members. Accordingly, the facing member is interlocked with the securing member throughout its entire length, and the screws 24 which fasten the securing member to the wall are spaced laterally of the interlocked joint so as to strongly resist being pulled away from the wall. Moreover, the solid extruded, cast or drawn facing member 18 is not easily dented or bent out of shape so as to detract from the locking efiiciency of the joint or from the ornamental appearance of the trim.

The modified form of trim shown in Fig. 8 comprises a sheet metal facing member 28 and a solid metal securing member 29. The facing member 28 is provided with an exterior contour similar to that of member 18, and with laterally projecting portions 26a similar to the portions 26 of member 18. The securing member 29 is provided with an upstanding or projecting rib 30 which may be of substantially triangular cross section having plane sides angularly disposed to each other with undercut portions 31 therein at the base of the rib. Securing flanges 32 extend laterally from the undercut portions 31, and are tapered from a maximum thickness at the rib 30 to a minimum thickness at their outer edges.

At its central portion the facing member 28 is provided with flanges 33 extending angularly inward and having hook portions 34 at their lower edges for engaging the undercut portions 31 and interlocking around the rib 30.

The securing member 29 is made co-extensive with the facing member 28, and the rib 30 and flanges 33 are co-extensive with their respective members. The projections 26a, in assembled position, are spaced above the upper surfaces of securing flanges 32 a distance equal to the thickness of the wall covering, and the tapered flanges eliminate any appreciable oil'set between the wall surface and the securing flanges so that the wall covering will be properly supported.

In the modification shown in Fig. '7 the facing member 28b is very similar to facing member 28, and has the lateral projections 26b. The securing member 19b is of sheet metal and is almost identical with member, 19, having the resilient channel 20b with reversely bent sides. Instead of the inwardly extending flanges 33 provided on member 28, facing member 28b has inwardly extending flanges 33b which are adapted to snap-fit into the resilient channel 20b to form a tight interlocked 'joint between member 28b and member 19b. Securing member 19b is co-extensive with facing member 28b, and is provided with laterally extending securing flanges 21b which are adapted to lie in the plane of the outer surface of the wall to which the securing member is attached.

The outside corner trim construction shown at 15 in Fig. 2 comprises the facing member 35,

which may be of solid extruded, cast or drawn metal, and the securing member 86, which may be of sheet metal. The securing member 36 is provided at its central portion with a longitudinally extending resilient channel 3'7 which may be dovetail'incross section, having plane sides inclined toward each other, and angularly disposed securing flanges 38 extend laterally from the'channel 37 so as to form a right angle, the securing flanges 38 lying in the planes of the outer intersecting surfaces 39 of the wall 11, and the channel 37 being located at the line of intersection 40 of the wall surfaces 39.

The facing member 35 is provided with angular projections 41, the undersurfaces of which are spaced from the securing flanges 38 a distance substantially equal to the thickness of the wall covering 12, so that the projections 41 engage over the outer adjacent edges of the panels of the wall covering. The facing member is also provided at its central portion with a longitudinally extending inwardly disposed rib 43, which has plane sides inclined to wedge-fit into the resilient channel 37 to form a resilient interlocked joint., The securing flanges 38 are fastened to the wall 11 by screws 45.

The inside corner trim construction shown in Fig. 3 comprises the facing member 42, which member 51 is provided with a may be of solid metal, and the securing member 36, which may be of sheet metal. The securing member 36' is provided at its central portion with a longitudinally extending resilient channel 37' Whichmay be dovetail in cross section and has reversely bent sides having plane irmer side portions inclined toward, each other as shown. Securing flanges 38' extend angularly from the channel 37 and are adapted to lie in the planes of the intersecting surfaces of the wall 11.

The facing member 42 is provided with an inwardly projecting rib 43 having plane inclined sides which are adapted to wedge-fit into the resilient channel 37 to form an interlocked joint between the member 42 and member 36'. The facing member 42 is provided with angular projections 44, the undersurfaces of which; are spaced from the securing flanges 38' a,distance equal to the thickness of the covering 12, so that the projections 44 engage over the outer adjacent edges of the adjacent panels of the covering 12. The securing flanges maybe secured to the wall by means of screws 45' inserted through the securing flanges 38.

In both the outside and inside corner trim constructionsv shown in Figs. 2 and 3 the facing member is co-extensive with the securing member, and the securing screws are spaced laterally of the interlocking joint. Although the interlocking joint is located at the line of intersection of the outer intersecting surfaces of the walls, it is not necessary to cut away or recess or alter the wall in any manner whatsoever.

. Obviously, the corner trim constructions shown in Figs. 2 and 3 may be modified as suggested by the modified forms shown in Figs. 6 and 7,- that is the facing members may be of sheet metal and/or the securing members may be of solid metal without departing from the scope of our invention as defined in the claims.

In Figs. 8 and 9 our improved trim construction is shown applied to the edging strip of a In Fig. 8, the securing member is of sheet metal and the facing member 51 is of solid extruded metal. The securing member is provided at the edge of the floor covering with the dovetail resilient channel 52 having reversely bent sides, and with an inwardly extending securing flange 53 which extends under the outer margin of the floor covering, The facing dovetail rib 54 which wedge fits into member. All of the herein illustrated forms of our imthe channel 52 to resilient interlocked Joint therewith.

In the form shown in Fig. 9 the facing mem-- ber 551s of sheet metal and the securing member 56 is of solid metal. The securing member 56 is provided with an upstanding longitudinal rib 57 preferably of substantially triangular cross-section having undercut portions 58 and an inwardly extending flange 59. The facing member is provided with resilient downwardly extending flanges 60 having hooked portions 61 at their ends for engaging the undercut portions 58, and forming a resilient interlocked Joint between the facing member and the securing member. The securing flange 59 forms.

is tapered from a maximum thickness at the rib 57 to a minimum thickness at its inner edge so that no appreciable oiiset is formedbetween the 'floor and said inner edge, and the floor covering is properly supported.

In Fig. 10 is shown our improved trim con struction as applied to a nosing for a stair tread. The nosing member 62 is of solid metal, and 63 is the securing member which maybe of sheet metal as shown. The securing member 63 has formed therein the resilient channel portion 64 and a securing flange 65 extends inwardly therefrom. The nosing member is pro- "vided with a rib 66 for wedge-fitting into channel 64 to form a resilient interlocked joint between the nosing member and the securing proved trim construction, are durable, inexpensive to manufacture, and easy to install, and all offthe wall trim constructions cover the edges of the wall covering and firmly anchor the same in position, while at the same time presenting a pleasing and ornamental appearance.

We claim; ,L-

construction including a solid exrud.ed facing member and a sheet metal securing member, thes'curing member being provided with a resilient channel having reversely bent plane sides the inner portions of which form a dovetailgroove, a flange extending laterally from the channel and adapted to be located in the plane of the outer surface of a supporting member, and the'solid extruded facing member being provided with a dovetail rib having plane sides for force-entering and wedgefltting the dovetail groove to form a resilient interlocked joint.

2. Trim construction for wall coverings and the like, including a solid extruded facing member and a sheet metal securing member, the securing member having a laterally extending flange adapted to be located in the plane of the outer surface of a supporting wall and the like, the solid facing member having a projecting rib provided with plane side portions angularly disposed to each other, and the sheet metal securing member being provided with resilient projections having plane side portions forming a groove adapted to receive said rib when forced therein in a direction perpendicular to the supporting wall, the plane side portions of the re-' channel inner portions of having reversely bent plane sides the which form a dovetail groove,

9. flange extending laterally from the channel and adapted to be located in the plane of the outer surface of a supporting member, and the facing member tially rigid dov being provided with a substanetail rib having plane sides for 

